▎ 摘　　要

NOVELTY - The preparation method of graphene nanobelt inline toughened carbon nanofiber involves (i) preparing nano-carbon fiber precursor liquid (A), stirring to obtain a homogeneous solution (A), (ii) configuring a graphene nanobelt dispersion as an aqueous surfactant solution (B), dispersing graphene nanobelt in solution (B) to obtain solution (C), ultrasonically vibrating to obtain a homogeneous solution (C), freezing, and freeze-drying to obtain easily dispersed graphene nanobelt powder, (iii) adding graphene nanobelt powder to solution (A) to obtain composite precursor solution (D). USE - Preparation of graphene nanobelt inline toughened carbon nanofiber used in composite material, conductive agent, thermal agent, and mechanical enhancer. ADVANTAGE - The method enables the preparation of graphene nanobelt inline toughened carbon nanofiber easily by simple process at low cost with high thermal conductivity, and mechanical strength. DETAILED DESCRIPTION - The preparation method of graphene nanobelt inline toughened carbon nanofiber involves (i) preparing nano-carbon fiber precursor liquid (A), where the concentration of the high molecular polymer in liquid (A) is 60-200 g/l, stirring the liquid (A) at 25-60 degrees C for 8-48 hours to obtain a homogeneous solution (A), (ii) configuring a graphene nanobelt dispersion as an aqueous surfactant solution (B), where the concentration of the surfactant in solution (B) is 0.5-2 g/l, dispersing graphene nanobelt in solution (B) to obtain solution (C), where the concentration of graphene nanobelt in the solution (C) is 0.2-0.4 g/l, ultrasonically vibrating the solution (C) at 200-400 W for 10-30 minutes to obtain a homogeneous solution (C), freezing the solution (C) at -20 to -40 degrees C for 6-24 hours, and freeze-drying at -80 to -50 degrees C, and 5-100 Pa for 12-24 hours to obtain easily dispersed graphene nanobelt powder, (iii) adding graphene nanobelt powder to solution (A) to obtain graphene nanobelt inline toughened carbon nanofiber composite precursor solution (D), where the concentration of the easily dispersed graphene nanobelt powder in the solution (D) is 1-10 g/l, and continuously stirring the solution (D) at 25-60 degrees C for 8-48 hours to obtain a homogeneous solution (D), (iv) placing the solution (D) in a spinning needle, where the needle diameter is 0.1-10 mm, distance between the needle and the receiving device is 13-25 cm, voltage is 10-25 kV, and needle infusion speed is 0.01-0.05 ml/minute, electrospinning, drying the material in an oven at 60-80 degrees C for 8-12 hours, preoxidizing in an air atmosphere at 200-300 degrees C for 0.5-3 hours at a rate of 1-3 degrees C/minute, naturally cooling to room temperature, high temperature carbonating at 600-2000 degrees C for 1-5 hours at a rate of 1-5 degrees C/minute, and naturally cooling to room temperature.